Signal transmission method and system
Provided are a signal transmission method and system, which relates to wireless communications. The method includes: transmitting, by a first node, a first signal. The first signal comprises at least one of: at least one first structure, or at least one second structure. The first structure includes at least one symbol group, and the symbol group of the first structure includes a cyclic prefix and at least one symbol or includes a cyclic prefix, at least one symbol and a guard period. Each symbol group of the first structure occupies a same subcarrier or a same frequency resource in a frequency domain. The second structure includes at least one symbol group, and the symbol group of the second structure comprises a cyclic prefix and at least one symbol or includes a cyclic prefix, at least one symbol and a guard period. Each symbol group of the second structure occupies a same subcarrier or a same frequency resource in the frequency domain.
1. A signal transmission method, comprising:
transmitting, by a first node, a first signal that comprises a first set of three symbol groups that include a first symbol group, a second symbol group, and a third symbol group,
wherein a first delta of frequency resource positions occupied by the first symbol group and the second symbol group is +M1 Hz,
wherein a second delta of the frequency resource positions occupied by the second symbol group and the third symbol group is −M1 Hz,
wherein M1 is a real number greater than 0,
a wherein the first signal includes a configuration for the first set of three symbol groups, and
wherein the configuration indicates a subcarrier interval, a cyclic prefix length, a number of symbols in one symbol group, and a value for M1.
2. The method of claim 1 ,
wherein a first subcarrier index occupied by the second symbol group is a function of K1 and a second subcarrier index occupied by the first symbol group and the third symbol group, and
wherein K1 is an integer greater than or equal to 1.
3. The method of claim 1 , wherein a symbol group from the first set of three symbol groups occupies a same subcarrier or a same frequency resource in a frequency domain.
4. The method of claim 1 , wherein each of the three symbol groups includes at least one symbol and a guard period.
5. The method of claim 1 ,
wherein the configuration is determined according to a time domain length of consecutive uplink resources, and
wherein the time domain length is calculated within a time window.
6. The method of claim 1 , wherein the cyclic prefix length is 266.7 μs or 66.7 μs.
7. The method of claim 1 , wherein the subcarrier interval is 3750 Hz.
8. The method of claim 1 , wherein the value for M1 is 3750 Hz or 22500 Hz.
9. The method of claim 1 , wherein the number of symbols in one symbol group is 2 or 3.
10. The method of claim 1 , wherein the first signal includes a scheduling request (SR) signal, a random access signal, or a positioning reference signal.
11. The method of claim 1 ,
wherein the first signal comprises a second set of two symbol groups,
wherein the second set of two symbol groups comprise a fourth symbol group and a fifth symbol group,
wherein a delta of frequency resource positions occupied by fourth symbol group and by the fifth symbol group is M4 Hz, and
wherein M4 is a real number unequal to 0.
12. The method of claim 11 , wherein a value of M4 is 3750 Hz, −3750 Hz, 22500 Hz, or −22500 Hz.